Regression: Win+H (Windows Voice Typing) no longer works in the CLI input box

### Describe the bug

Regression: Win+H (Windows Voice Typing) no longer works in the CLI input box — broke with the v1.0.61 input restyling.

Repro:

1. Launch copilot (Windows 11, Windows Terminal)
2. Focus the input prompt
3. Press Win+H
4. Get error: "To use voice typing, select a text box then try again"

Confirmed not a Windows-side issue: Win+H works correctly in Notepad in the same session.

Used to work in prior versions. The 1.0.61 changelog notes "styled inputs… borders, headers" — the new input frame appears to no longer expose itself to Windows as a standard editable control, so voice typing (and likely other IME / accessibility tools) cannot target it.

Impact: blocks dictation as an input method, which is meaningful for long prompts.

Version: 1.0.61

### Affected version

_No response_

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

首先，在 Windows 11 的 Windows Terminal 中使用 1.0.61 版本重现该问题，然后将输入行为与之前的版本以及 Notepad 进行比较。重点关注 v1.0.61 更新日志中提到的输入重新样式化；当 Win+H 可以再次定位到 CLI 输入框，且不会导致正常提示符输入出现回归时，即视为完成。

由索引模型根据 Issue 内容生成。